Metal-heating furnace.



PATEN TED MAY 5, 1908.

J. R. GEORGE.

METAL HEATING FURNACE.

APPLICATION IILED MAR. 6. 1905.

Inuen ior chrome R. George 1 from contact with the cooling UNITED STATESPATENT OFFICE.

JEROME R. GEORGE, OF WORCESTER, MASSACHUSETTS, ASSIGNOR TO MORGANCONSTRUC- TION COMPANY, OF WORCESTER, MASSACHUSETTS, A CORPORATION OFMASSACHU- SETTS.

METAL-IEA'IIRG FURNACE.

- Specification of Letters Patent.

Patented Mayo, 1908.

Application filed Kai-ch 8, 1906. Seriai No. 248,507.

To all whom it may concern:

Be it known that I, JEROME R. GEORGE, a citizen of the United States,residing at Worcester, in the county of Worcester and Commonwealth ofMassachusetts, have invented a new and useful Improvement inMetal-Heating Furnaces, of which the folof a portion of the track alongwhich the metal bars are moved through the heating chamber. Fig. 3 is acentral longitudinal sectional view of the metal shoe forming a portionof the track and detached therefrom, and Fig. 4 is a transversesectional View of the same on line 44, Fig. 3.

Similar reference letters and figures refer to similar parts in thedifferent views.

My present invention relates to an improvement in that class of metalheating furnaces which comprise a heating chamber provided with a trackextending longitudinally through the chamber and composed of pipesthrough which a circulation of water 1s maintained in order to protectthem from the intense 'heat of the furnace, and along which the metalbars are pushed from the admission to the delivery .end of the heatingchamber.

The object of my invention is to secure the uniform heating of a metalbar as it is delivered from the furnace, and it consists in providingmeans for removing the metal bar water pipes of the track just beforeits with rawal from the furnace and for a sufficient period to enablethe portion of the metal bar which has been in contact with the coolingwater pipes to become heated uniformly with the remainder of the metalbar.

In the accompanying drawings I have shown my invention as applied towhat is known as a gravityoischarge furnace, the construction andoperation of which will be well understood by those conversant withmetal heating furnaces. It com rises a heating chamber 1 containing atrac for the metal bars, consisting of water pipes 2extendinglongitudinally through the heating chamber, one of said pipesbeing shown in v Fig. 1. The metal bars are admitted u on the waterpipes 2 at one end of the cham er and are pushed along by a step-by-stepmotion to the opposite or delivery end of the chamber, where the waterpipes are given a sharp bend downward formm an lnclined section 3 of thetrack, over which the metal bars are delivered by gravity. through adelivery o ening 4 upon conveyer rolls 5.

The hroken lines 6, Fig. 1 indicate the position of the metal bars onthe water pipes etween the admission end of the furnace and the inclinedsection 3 of the track, and the broken lines 7 indicate ametal barpassing down the inclined section 3 of the track. The water pi es areraised above the bed of the heating 0 amber to permit the application ofheat to the under side of the metal bars, but those portions of themetal bars which come in contact with the water pipes are subjected tothe cooling influence of the water circulating throu h the track, sothat they become less heate than the remainder of the, bars, and whendelivered from the furnac'e these less heated spots are harder and lessductile than the remainder of the bar, resulting in unequal sectionswhen rolled.

It is the object of-my present invention to obviate this difficultyencountered in heatin metal bars in contact with a water cooled trackand to render the entire mass of'the metal bar uniformly heated as it isdelivered from the furnace, and-I accomplish this result by making ashort downward bend at 8 in the pipe formin the track and'ashortdistance in front of t e inclined section 3 forming a depressed section9 of the track-to which I attach by welding or otherwise-a collar 10.Upon the de ressed section 9 of the track I mount a meta shoe 1iipreferablyof cast steel, having its under an ace loo 1- tudinallygrooved at 12 to receive the epressed section of thepipe and formlongitudinal flan es 13, 13, extending downward upon each side of thepipe. The flanges 13 are extended at one end of the shoe at 15 toinclo'se the bent section 8 of the pi e, and at the opposite end of theshoe the fihnges are extended at 16 to inclose the bend 17 at thebeginning of the inclined section 3. The shoe is also rovided with acentral recess 18 to receive the collar 10 attached to the pipe in orderto prevent the longitudinal movement of the shoe on the me and theextended ends 15 and 16 of t e flanges as they inclose bent sections ofthe pipe tend to pre- I ed upon said depressed section and having ventthe rocking of the shoe on the pipe. The shoe is further provided withholes 19 to receive the ends of iron bars or rods by which the shoe maybe inserted'through an opening or door 20 in the side walls of thefurnace and placed in position upon the water pipe, also enabling s oeswhic i have become eaten by the intense heat of the furnace to bereplaced by new shoes. The n per portion of the shoe is preferably re(need in thickness 'to form a limited su porting surface 21, Fig. 4, forthe metal iiars, the position of which on the shoe is indicated by. thebroken lines 22, Fig. 4. The forward movement of the metal bars alongthe track causes the bars to be successively moved out ofv contact withthe water pipes and into contact with the shoes 11, in which positionthe under 20 surface of the bars is considerably removed from the waterpipes and is in limited contact with the apex or upper surface of theshoes. During the movement of the metal bars across the shoes 11 the aplication of heat to the under surface of t e bars previously in contactwith the water pipes and the retained heat from the bars themselvescauses a diffusion of heat through the partially heated spots previouslyin contact with the water pipes until the entire mass of the bar becomesheated uniformly by the time it reaohesthe inclined section 3 of thetrack, when it is rapidly delivered by ravity through the deliveryopening 4 of t e furnace. I

What I claim as my invention and desire to secure by Letters Patentis 1. The combination with a water cooled pipe formingthe track of ametal heating urnace and having a depressed section, of a detachableshoe supported by the top of said depressed section and having its uppersurface at one end in the lane of said track and at its opposite end higer than the depressed section of the track, whereby a metal barsupported on said shoe is removed from contact with the water cooledpipe.

2. The combination with the water cooled ipe forming the track of ametal heating filrnace, of a detachable shoe loosely held on said pipe,whereby a metal bar supported on said shoe is removed from contact withsaid ipe, and means for holding said shoe from ongitudinal movement onsaid pipe.

3. The combination with a water cooled pipe forming the track of a metalheating fnrmace, and having a depressed section rovided witha collar,of'a shoe applied to said e ressed section and having a recess fittingsai collar whereby said shoeis held from'longitudi'na movement.

4. The combination with a water cooled pipe forming the track of a metalheating mace, and having a depressed section pro- 55 duced by a bend inthe pipe, of a shoe mountflanges inclosing the bend in the pipe,whereby, said shoe is held from rocking on the pi e.

5. The combination with a water cool ed pipe forming the track of ametal heating furnace, and having a depressed section, of a detachableshoe mounted upon said depressed section of the pipe, and having itsupper surface reduced in thickness and having downwarddepending flangesinclosing the sides of the pipe, with the. upper surface of said shoelying in the normal plane of said track, and means for holding said shoefrom longitudinal movement.

6. The combination with a water cooled ipe forming the track of a metalheating urnace, and having an inclined section at the delivery end ofthe furnace over which the heated metal bars are delivered by gravity,and a depressed section adjacent to said inclined section, of a shoeadapted to be supported on said depressed section of the pipe, and meansfor moving a metal bar from said track across said shoe upon saidinclined section, said shoe havin the upper surface of its receiving endin the normal plane of said track and having its delivery end at theinclined section of the track.

7. In a metal heating furnace, in combination, a heating chamber, alongitudinal water cooled track for billets, and means for removing thebillets from said water cooled track near its discharging end andcomprising a removable shoe of refractory material having its uppersurface in a lane above the 10() corresponding section of sai watercooled track, said track forming a water cooled support for said shoe,and means for holding said shoe from longitudinal movement.

8. In a metal heating furnace, in combina- 5 tion, a heating chamber, alongitudinal Water cooled track for billets having an inclineddischarging section, a removable shoe of refractory material supportedon said water cooled track for su porting the billets ad'acent to saidincline section, means for holding the shoe from longitudinal movementon said track,and means for pushing the billet" over said shoe and fromsaid shoe to the inclined section of the track, whereby the. billets-areremoved from said track immedi ately before entering upon said inclinedsection.

9. In a metal heating furnace, in combination, a heating chamber, alongitudinal'water cooled track for billets having an inclineddischarging section,-with a clear space between said track and the floorof "the heating chamber adjacent to said inclined section, and means forremoving the billets from said 'water cooled trackwad acent to itsinclined section, consisting o a emovable metal shoe and a water cooledsupport for said shoe.

10. In ametal heating furnace, in combination, a heating chamber, alongitudinal water cooled track for billets, means for re.- moving abillet from said track near its discharge end and consisting of aremovable shoe of refractory material having its supporting surface inadiflerent plane than t e corresponding section of the water cooledtrack, supported by said water cooled track.

11. In a metal heating furnace, in combination, a heating chamber, alongitudinal Water cooled track for billets, a removable sup ort for thebillets supported upon sau track near the discharge end, having itssupporting surface in a different plane than the correspondin section ofthe water cooled track, whereby t e billets are removed from contactwithsaid track, and means for bolding said removable billet support fromlongitudinal movement.

12. In a metal heating furnace, a heating chamber, a longitudinal trackfor billets, a

removable support for the billets near the dischar e end of andsupported upon said track, aving its sup ortlng surface in a differentplane from t e corresponding, sec tion of said longitudinal track,whereby the billets are'removed from contact with said track, and meansfor holdi said removable billet support from longitu inal movement. 13.In a metal heating furnace, a heating chamber, a longitudinal track forbillets, a removable supplort for thebillets resting upon said tracaving its supporting surface in a different lane from the correspondingsection of said longitudinal track, whereb the billets areremoved fromcontact wit said track. I

Dated this 15th day of February 1905.

JEROME R. GEORGE.

Witnesses: V

PENELOPE COMBERBACH, RUFUS B. FOWLER.

